Levensritmen :

MLA

Smith, Anthony, and B. H Loof. Levensritmen . Den Haag: W. Gaade, 1970.

APA

Smith, A., & Loof, B. H. (1970). Levensritmen . Den Haag: W. Gaade.

Chicago

Smith, Anthony Levensritmen :. Translated by B. H Loof. Den Haag: W. Gaade, 1970.