APA

Gradstein S. R., Churchill S. P. & Salazar Allen N. (2001). Guide to the bryophytes of tropical America / S. Robbert Gradstein; Steven P. Churchill; Noris Salazar-Allen. New York: New York Botanical Garden.

Chicago

Gradstein S Robbert, Churchill Steven P and Salazar Allen Noris. 2001. Guide to the bryophytes of tropical America / S. Robbert Gradstein; Steven P. Churchill; Noris Salazar-Allen. New York: New York Botanical Garden.

Harvard

Gradstein S. R., Churchill S. P. and Salazar Allen N. (2001). Guide to the bryophytes of tropical America / S. Robbert Gradstein; Steven P. Churchill; Noris Salazar-Allen. New York: New York Botanical Garden.

MLA

Gradstein S Robbert, Churchill Steven P and Salazar Allen Noris. Guide to the bryophytes of tropical America / S. Robbert Gradstein; Steven P. Churchill; Noris Salazar-Allen. New York: New York Botanical Garden. 2001.