APA استشهاد

Willis, J. C. A revised catalogue of the indigenous flowering plants and ferns of Ceylon.

استشهاد بنمط شيكاغو

Willis, J. C. A Revised Catalogue of the Indigenous Flowering Plants and Ferns of Ceylon.

MLA استشهاد

Willis, J. C. A Revised Catalogue of the Indigenous Flowering Plants and Ferns of Ceylon.