APA

(1944). Catalogue of the vascular plants of S.tome (with Principe and Annobon). London: British Museum Natural History.

Chicago

1944. Catalogue of the vascular plants of S.tome (with Principe and Annobon). London: British Museum Natural History.

Harvard

(1944). Catalogue of the vascular plants of S.tome (with Principe and Annobon). London: British Museum Natural History.

MLA

Catalogue of the vascular plants of S.tome (with Principe and Annobon). London: British Museum Natural History. 1944.