APA (7th ed.) Citation

Williams, H. R. (1980). Progressive drug involvement: Marihuana use careers among Nicaraguan private secondary school students. Univ. Microfilms Internat.

Chicago Style (17th ed.) Citation

Williams, Harvey R. Progressive Drug Involvement: Marihuana Use Careers Among Nicaraguan Private Secondary School Students. Ann Arbor, Mich: Univ. Microfilms Internat, 1980.

MLA (9th ed.) Citation

Williams, Harvey R. Progressive Drug Involvement: Marihuana Use Careers Among Nicaraguan Private Secondary School Students. Univ. Microfilms Internat, 1980.

Warning: These citations may not always be 100% accurate.