APA

Roscher W. G. F., Bourne E. G. & Baldwin E. H. (1944). The Spanish colonial system. Cambridge, Massachusetts: .

Chicago

Roscher Wilhelm Georg Friedrich, Bourne Edward Gaylord and Baldwin Ernest Hickok. 1944. The Spanish colonial system. Cambridge, Massachusetts: .

Harvard

Roscher W. G. F., Bourne E. G. and Baldwin E. H. (1944). The Spanish colonial system. Cambridge, Massachusetts: .

MLA

Roscher Wilhelm Georg Friedrich, Bourne Edward Gaylord and Baldwin Ernest Hickok. The Spanish colonial system. Cambridge, Massachusetts: . 1944.