Cita APA

Beck, C. (1988). Origin and evolution of gymnosperms. Bishen singh Mahendra Pal Singh.

Citación estilo Chicago

Beck, C. Origin and Evolution of Gymnosperms. Dehradun: Bishen singh Mahendra Pal Singh, 1988.

Cita MLA

Beck, C. Origin and Evolution of Gymnosperms. Bishen singh Mahendra Pal Singh, 1988.

Warning: These citations may not always be 100% accurate.