APA (7e ed.) Bronvermelding

Knodel, J. E. (1974). The decline of fertility in Germany, 1871-1939: By John E. Knodel. Princeton University Press.

Chicago (17e ed.) Bronvermelding

Knodel, John E. The Decline of Fertility in Germany, 1871-1939: By John E. Knodel. Princeton, New Jersey: Princeton University Press, 1974.

MLA (8e ed.) Bronvermelding

Knodel, John E. The Decline of Fertility in Germany, 1871-1939: By John E. Knodel. Princeton University Press, 1974.