Cita APA

Keiding, N., Giwercman, A., Carlsen, E., & Skakkebaek, N. E. (1994). Falling sperm quality. BMJ Group.

Chicago Style Citation

Keiding, N., A. Giwercman, E. Carlsen, i N. E. Skakkebaek. Falling Sperm Quality. BMJ Group, 1994.

Cita MLA

Keiding, N., A. Giwercman, E. Carlsen, i N. E. Skakkebaek. Falling Sperm Quality. BMJ Group, 1994.