APA 7th Edition is the most commonly used referencing style here at the University of Portsmouth. Below you will find general guidance on how to reference and cite using APA 7th Edition, as well as examples for the specific sources you are likely to use in your assignments. 

Your department or lecturer may prefer you to reference sources differently from the guidance given here. Always follow the requirements of your department or lecturer. 

External visitors are welcome to use this guide, but note that your institution's requirements may differ from those suggested here.

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Advance online publication generally refers to peer-reviewed work available before it has gone to print. This means that volume number, issue number and page numbers may be missing. 

Reference 

Add 'Advance online publication' where the missing source information would usually be in the reference.

Author, Initials. (Year of Publication). Title of article. Title of Journal. Advance online publication. https://doi.org/ or URL

van Rooyen, A., Miller, A.D., Clark, Z., Sherman, C. D. H., Butcher, P. A., Rizzari, J. R., & Weeks, A. R. (2021). Development of an environmental DNA assay for detecting multiple shark species involved in human–shark conflicts in Australia. Environmental DNA. Advance online publication. https://doi.org/10.1002/edn3.202

In-text Citation 

Recent research suggests... (van Rooyen et al., 2021)

In a recent study, van Rooyen et al. (2021) suggests...