APA (7e ed.) Bronvermelding

AZPIRI, H. S., & Fernández, V. D. J. S. (2006). Comparative performance of the giant cardon cactus (Pachycereus pringlei) seelings under two leguminous nurse plant species. Journal of Arid Environments.

Chicago (17e ed.) Bronvermelding

AZPIRI, HUMBERTO SUZAN, en Vinicio De Jesús Sosa Fernández. Comparative Performance of the Giant Cardon Cactus (Pachycereus Pringlei) Seelings Under Two Leguminous Nurse Plant Species. Journal of Arid Environments, 2006.

MLA (9e ed.) Bronvermelding

AZPIRI, HUMBERTO SUZAN, en Vinicio De Jesús Sosa Fernández. Comparative Performance of the Giant Cardon Cactus (Pachycereus Pringlei) Seelings Under Two Leguminous Nurse Plant Species. Journal of Arid Environments, 2006.