APA aipamena

Willis, J. C. (1978). Revised catalogue of the indigenous flowering plants and ferns of ceylon. Bishen Singh Mahendra Pal Singh.

Chicago Style aipamena

Willis, J C. Revised Catalogue of the Indigenous Flowering Plants and Ferns of Ceylon. Dehradun: Bishen Singh Mahendra Pal Singh, 1978.

MLA aipamena

Willis, J C. Revised Catalogue of the Indigenous Flowering Plants and Ferns of Ceylon. Bishen Singh Mahendra Pal Singh, 1978.