APA

McRae R., . (1961). The problem of the unity of the sciences. Toronto: University of Toronto Press.

Chicago

McRae Robert, . 1961. The problem of the unity of the sciences. Toronto: University of Toronto Press.

Harvard

McRae R., . (1961). The problem of the unity of the sciences. Toronto: University of Toronto Press.

MLA

McRae Robert, . The problem of the unity of the sciences. Toronto: University of Toronto Press. 1961.