Friedrich, D., & Heckmann, W. (1995). Aids in Europe - the behavioural aspect: Vol 1: general aspects. Berlin: SIGMA.
Chicago Style (17th ed.) CitationFriedrich, Dorothee, and Wolfgang Heckmann. Aids in Europe - the Behavioural Aspect: Vol 1: General Aspects. Berlin: SIGMA, 1995.
MLA (8th ed.) CitationFriedrich, Dorothee, and Wolfgang Heckmann. Aids in Europe - the Behavioural Aspect: Vol 1: General Aspects. Berlin: SIGMA, 1995.
Warning: These citations may not always be 100% accurate.