APA

Berry F. H., Kress W. J. & Smithsonian Institution. (1991). Heliconia. Washington and London: Smithsonian Institution.

Chicago

Berry Frederick H, Kress W John and Smithsonian Institution. 1991. Heliconia. Washington and London: Smithsonian Institution.

Harvard

Berry F. H., Kress W. J. and Smithsonian Institution. (1991). Heliconia. Washington and London: Smithsonian Institution.

MLA

Berry Frederick H, Kress W John and Smithsonian Institution. Heliconia. Washington and London: Smithsonian Institution. 1991.