Cita APA (7th ed.)

Heywood, V. H., Brummitt, R. K., Culham, A., & Seberg, O. (2007). Flowering plant families of the world. Firefly Books.

Cita Chicago (17th ed.)

Heywood, Vernon Hilton, R. K. Brummitt, A. Culham, i O. Seberg. Flowering Plant Families of the World. New York, USA: Firefly Books, 2007.

Cita MLA (9th ed.)

Heywood, Vernon Hilton, et al. Flowering Plant Families of the World. Firefly Books, 2007.