Παραπομπή APA

Hebblethwaite, P. (1980). Seed production. Butterworths.

Παραπομπή Chicago Style

Hebblethwaite, P.D. Seed Production. London: Butterworths, 1980.

Παραπομπή MLA

Hebblethwaite, P.D. Seed Production. Butterworths, 1980.