Heywood, V. H. (1968). Plant Taxonomy. Edward Arnold (Publishers) Ltd.
Cita Chicago (17th ed.)Heywood, V. H. Plant Taxonomy. Edward Arnold (Publishers) Ltd, 1968.
Cita MLA (9th ed.)Heywood, V. H. Plant Taxonomy. Edward Arnold (Publishers) Ltd, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.