Dyfyniad APA

Davis, P. H., & Heywood, V. H. (1973). Principles of angiosperm taxonomy. Huntington.

Dyfyniad Arddull Chicago

Davis, P. H., and V. H. Heywood. Principles of Angiosperm Taxonomy. New York: Huntington, 1973.

Dyfyniad MLA

Davis, P. H., and V. H. Heywood. Principles of Angiosperm Taxonomy. Huntington, 1973.

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