Nguyen และผู้แต่งคนอื่นๆ. 1998. Premarital sexual behavior among single male students aged 17-24 in Hanoi and Ho Chi Minh City of Vietnam. Faculty of Graduate Studies, Mahidol University;
Nguyen และผู้แต่งคนอื่นๆ. (1998) Premarital sexual behavior among single male students aged 17-24 in Hanoi and Ho Chi Minh City of Vietnam . Mahidol University/Bangkok.
Nguyen และผู้แต่งคนอื่นๆ. Premarital sexual behavior among single male students aged 17-24 in Hanoi and Ho Chi Minh City of Vietnam. . Bangkok:Mahidol University, 1998.
Nguyen และผู้แต่งคนอื่นๆ. (1998) Premarital sexual behavior among single male students aged 17-24 in Hanoi and Ho Chi Minh City of Vietnam . Mahidol University/Bangkok.