Παραπομπή APA

D B Crighton, G R Foxcroft, & N B Haymer. (1978). Control of ovulation. Butterworths.

Παραπομπή Chicago Style

D B Crighton, G R Foxcroft, και N B Haymer. Control of Ovulation. Butterworths, 1978.

Παραπομπή MLA

D B Crighton, et al. Control of Ovulation. Butterworths, 1978.