Citazione Stile APA (7a Edizione)

Whitsell, R. H. (1989). Propagating avocados: Principles and techniques of nursery and field grafting. University of California.

Citazione stile Chigago Style (17a edizione)

Whitsell, R. H. Propagating Avocados: Principles and Techniques of Nursery and Field Grafting. Oakland: University of California, 1989.

Citatione MLA (9a ed.)

Whitsell, R. H. Propagating Avocados: Principles and Techniques of Nursery and Field Grafting. University of California, 1989.