Harvard

To be made up of:

• Author.
• Date (in round brackets).
• Title of data (in single quotation marks).
• Available at: URL (or doi if available).
• (Accessed: date) (not required when doi used).

In-text citation:

(Custer, 2018)

Reference list:

Custer, C. M. (2018). 'Annual Variation Birds as indicators of contaminants in the Great Lakes'. doi.org/10.5066/F7SB452P.