APA Edition Citation

Davis, P., & Heywood, V. (1963). Principles of angiosperm taxonomy.

Chicago Edition Citation

Davis, Ph, and Vh Heywood. Principles of Angiosperm Taxonomy. 1963.

MLA Edition Citation

Davis, Ph, and Vh Heywood. Principles of Angiosperm Taxonomy. 1963.

Warning: These citations may not always be 100% accurate.