The Octagon :
journal of the American Institute of Architects.

APA Citation

Octagon (Washington, D., American Institute of Architects. (19291943). The Octagon: journal of the American Institute of Architects. [Washington, D.C.]: The Institute.

MLA Citation

Octagon (Washington, D.C.), and American Institute of Architects. The Octagon: Journal of the American Institute of Architects. [Washington, D.C.]: The Institute, 19291943.

Warning: These citations may not always be complete (especially for serials).