Cita APA (7th ed.)

Friedrich, D. (1995). Aids in Europe - the behavioural aspect. Sigma.

Cita Chicago (17th ed.)

Friedrich, Dorothee. Aids in Europe - the Behavioural Aspect. Berlin: Sigma, 1995.

Cita MLA (8th ed.)

Friedrich, Dorothee. Aids in Europe - the Behavioural Aspect. Sigma, 1995.