Gaya APA
Witters, P, J., Witters, W, L. (1986).
Drugs & society: a biological persfektif .
Amerika:
American Scientist Magazine.
Gaya MLA
Witters, Patricia, Jones., Witters, Weldon, L..
"Drugs & society: a biological persfektif".
Amerika:
American Scientist Magazine,
1986.
Text.