APA (7th ed.) Citation

Harkness, R. (1983). OTC handbook: What to recommend & why (2nd ed.). Medical Economics Books.

Chicago Style (17th ed.) Citation

Harkness, Richard. OTC Handbook: What to Recommend & Why. 2nd ed. Oradell, New Jersey: Medical Economics Books, 1983.

MLA (9th ed.) Citation

Harkness, Richard. OTC Handbook: What to Recommend & Why. 2nd ed. Medical Economics Books, 1983.