Cita APA

Sporne, K. R., & Sporne, K. R. (1974). The Morphology of gymnosperms: The structure and evolution of primitive seed-plants (Second edition.). London: Hutchinson University Library.

Citación estilo Chicago

Sporne, Kenneth R., y Kenneth R. Sporne. The Morphology of Gymnosperms: The Structure and Evolution of Primitive Seed-plants. Second edition. London: Hutchinson University Library, 1974.

Cita MLA

Sporne, Kenneth R., y Kenneth R. Sporne. The Morphology of Gymnosperms: The Structure and Evolution of Primitive Seed-plants. Second edition. London: Hutchinson University Library, 1974.