Citazione Stile APA (7a Edizione)

KIRBY, S. H. (2007). A FORM AND CHECKLIST FOR THE DESCRIPTION OF ORCHIDS IN THE FIELD AND LABORATORY WORK. Universidad de Costa Rica.

Citazione stile Chigago Style (17a edizione)

KIRBY, STEPHEN H. A FORM AND CHECKLIST FOR THE DESCRIPTION OF ORCHIDS IN THE FIELD AND LABORATORY WORK. Universidad de Costa Rica, 2007.

Citatione MLA (9a ed.)

KIRBY, STEPHEN H. A FORM AND CHECKLIST FOR THE DESCRIPTION OF ORCHIDS IN THE FIELD AND LABORATORY WORK. Universidad de Costa Rica, 2007.