Cita APA (7th ed.)

Davis, P. H., & Heywood, V. H. (2017). Principles of Angiosperm Taxonomy. Scientific Publishers.

Cita Chicago (17th ed.)

Davis, Peter Hadland, i Vernon Hilton Heywood. Principles of Angiosperm Taxonomy. Jodhpur: Scientific Publishers, 2017.

Cita MLA (9th ed.)

Davis, Peter Hadland, i Vernon Hilton Heywood. Principles of Angiosperm Taxonomy. Scientific Publishers, 2017.