Citazione Stile APA (7a Edizione)

Tryo, R. M., & Tryon, A. F. (1982). Ferns and allied plants: With special reference to tropical America. Springer.

Citazione stile Chigago Style (17a edizione)

Tryo, Rolla M., e Alice F. Tryon. Ferns and Allied Plants: With Special Reference to Tropical America. New York, USA: Springer, 1982.

Citatione MLA (9a ed.)

Tryo, Rolla M., e Alice F. Tryon. Ferns and Allied Plants: With Special Reference to Tropical America. Springer, 1982.