Nelson, A. (1962). Introductory botany (2nd ed.). E.&S. Livingstone.
Cita Chicago (17th ed.)Nelson, Alexander. Introductory Botany. 2nd ed. Edinburgh: E.&S. Livingstone, 1962.
Cita MLA (8th ed.)Nelson, Alexander. Introductory Botany. 2nd ed. E.&S. Livingstone, 1962.
Atenció: Aquestes cites poden no estar 100% correctes.