Cita APA

Willis, J. C. 1. (1949). The birth and spread of plants. The Chronica Botanica.

Citación estilo Chicago

Willis, J. C. 1868-1958. The Birth and Spread of Plants. Waltham, Mass.: The Chronica Botanica, 1949.

Cita MLA

Willis, J. C. 1868-1958. The Birth and Spread of Plants. Waltham, Mass.: The Chronica Botanica, 1949.