Παραπομπή APA

Modell, W., & Lancing, A. (1967). Drugs. Time life books.

Παραπομπή Chicago Style

Modell, Walter, και Alfred Lancing. Drugs. New York: Time life books, 1967.

Παραπομπή MLA

Modell, Walter, και Alfred Lancing. Drugs. Time life books, 1967.