Citazione Stile APA (7a Edizione)

Calvert, W. H., Hyatt, M. B., & Mendoza Villaseñor, N. P. (1986). The effects of understory vegetation on the survival of overwintering Monarch butterflies, (Danaus plexippus L.) in Mexico. Instituto de Ecología, A.C.

Citazione stile Chigago Style (17a edizione)

Calvert, William H., Martin B. Hyatt, e Norma P. Mendoza Villaseñor. The Effects of Understory Vegetation on the Survival of Overwintering Monarch Butterflies, (Danaus Plexippus L.) in Mexico. Instituto de Ecología, A.C, 1986.

Citatione MLA (9a ed.)

Calvert, William H., et al. The Effects of Understory Vegetation on the Survival of Overwintering Monarch Butterflies, (Danaus Plexippus L.) in Mexico. Instituto de Ecología, A.C, 1986.