APA

Warren H. G., . (1949). Paraguay, an informal history. Oklahoma: University of Oklahoma Press.

Chicago

Warren Harris Gaylord, . 1949. Paraguay, an informal history. Oklahoma: University of Oklahoma Press.

Harvard

Warren H. G., . (1949). Paraguay, an informal history. Oklahoma: University of Oklahoma Press.

MLA

Warren Harris Gaylord, . Paraguay, an informal history. Oklahoma: University of Oklahoma Press. 1949.