Cita APA

Howard, R. A. 1., Wagenknecht, B. L. 1., & Green, P. S. 1. (1963). International directory of botanical gardens. Utrecht, Netherlands: IAPT.

Citación estilo Chicago

Howard, Richard Alden 1917-2003, Burdette L. 1925-2015 Wagenknecht, y Peter Shaw 1920-2009 Green. International Directory of Botanical Gardens. Utrecht, Netherlands: IAPT, 1963.

Cita MLA

Howard, Richard Alden 1917-2003, Burdette L. 1925-2015 Wagenknecht, y Peter Shaw 1920-2009 Green. International Directory of Botanical Gardens. Utrecht, Netherlands: IAPT, 1963.