Feldblum, P. J., Weir, S. S., & Cates, W. (1999). The protective effect of condoms and nonoxynol-9 against HIV infection: A response to Wittkowski and colleagues.
Chicago-tyylinen lähdeviittausFeldblum, P J., S S. Weir, ja W. Cates. The Protective Effect of Condoms and Nonoxynol-9 against HIV Infection: A Response to Wittkowski and Colleagues. 1999.
MLA-viiteFeldblum, P J., S S. Weir, ja W. Cates. The Protective Effect of Condoms and Nonoxynol-9 against HIV Infection: A Response to Wittkowski and Colleagues. 1999.
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