The required elements for a reference containing hyphenated first names are:
Book:
Author Surname, INITIALS.-HYPENATED FIRST NAME (Year) Title of source. Edition (if not the first). Place of publication: Publisher.
Journal Article:
Author Surname, INITIALS.-HYPENATED FIRST NAME (Year) Title of article. Title of Journal, volume number(issue or part number, if present), page numbers of the article.
Reference List
Example of the full reference at the end of your assignment:
Lim, E.-J., Ahn, Y.-C., Jang, E.-S., Lee, S.-W., Lee, S.-H. and Son, C.-G. (2020) Systematic review and meta-analysis of the prevalence of chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME). Journal of Translational Medicine, 18(1), 1-15.
In-text citation
Example 1 - where the author's name occurs naturally in the sentence
Lim et al. (2020) stated that…….
Example 2 - where the author's name does not occur naturally in the sentence
Chronic fatigue syndrome has become quite a common condition worldwide (Lim et al. 2020).