APA citiranje

Cowan, F. M., Flegg, P. J., & Brettle, R. P. (1989). Heterosexually acquired HIV infection.

Citação norma Chicago

Cowan, Frances M., Peter J. Flegg, and Raymond P. Brettle. Heterosexually Acquired HIV Infection. 1989.

MLA citiranje

Cowan, Frances M., Peter J. Flegg, and Raymond P. Brettle. Heterosexually Acquired HIV Infection. 1989.