Cita APA

Ulmer, T., MacDougal, J. M. 1., & Ulmer, B. (2004). Passiflora: Passionflowers of the world. Portland, Oregon: Timber Press.

Citación estilo Chicago

Ulmer, Torsten, John Mochrie 1954- MacDougal, y Bettina Ulmer. Passiflora: Passionflowers of the World. Portland, Oregon: Timber Press, 2004.

Cita MLA

Ulmer, Torsten, John Mochrie 1954- MacDougal, y Bettina Ulmer. Passiflora: Passionflowers of the World. Portland, Oregon: Timber Press, 2004.