Παραπομπή APA

Frey, K. G. (1977). Plant breeding: A symposium held at iowa state university. Iowa state university press.

Παραπομπή Chicago Style

Frey, Kenneth G. Plant Breeding: A Symposium Held at Iowa State University. Iowa: Iowa state university press, 1977.

Παραπομπή MLA

Frey, Kenneth G. Plant Breeding: A Symposium Held at Iowa State University. Iowa state university press, 1977.