APA (7th ed.) Citation

Kress, W. J. (1990). The taxonomy of Old World Heliconia (Heliconiaceae). National Tropical Botanical Garden.

Chicago Style (17th ed.) Citation

Kress, W. John. The Taxonomy of Old World Heliconia (Heliconiaceae). Lawai [u.a.]: National Tropical Botanical Garden, 1990.

MLA (9th ed.) Citation

Kress, W. John. The Taxonomy of Old World Heliconia (Heliconiaceae). National Tropical Botanical Garden, 1990.