Não informado. (2001). Amaryllis yearbook. American Plant Life Society.
Style de citation Chicago (17e éd.)Não informado. Amaryllis Yearbook. La Jolla, Calif: American Plant Life Society, 2001.
Style de citation MLA (8e éd.)Não informado. Amaryllis Yearbook. American Plant Life Society, 2001.
Attention : ces citations peuvent ne pas être correctes à 100%.