APA

Gradstein S. R., Churchill & Salazar-Allen N. (2001). Guide to the Bryophytes of tropical America. New York, USA: New York Botanical Garden.

Chicago

Gradstein S R, Churchill and Salazar-Allen Noris. 2001. Guide to the Bryophytes of tropical America. New York, USA: New York Botanical Garden.

Harvard

Gradstein S. R., Churchill and Salazar-Allen N. (2001). Guide to the Bryophytes of tropical America. New York, USA: New York Botanical Garden.

MLA

Gradstein S R, Churchill and Salazar-Allen Noris. Guide to the Bryophytes of tropical America. New York, USA: New York Botanical Garden. 2001.