APA引文

M. Gabb, W. (2007). On the Geology of the Republic of Costa Rica.

Citación estilo Chicago

M. Gabb, William. On the Geology of the Republic of Costa Rica. 2007.

MLA引文

M. Gabb, William. On the Geology of the Republic of Costa Rica. 2007.

警告：這些引文格式不一定是100％准確.