Franklin

MLA

Occupational Employment Statistics Survey Processing and Management System Spam User's Guide. [Washington, D.C.?]: The Bureau, 1988.

APA

(1988). Occupational Employment Statistics Survey Processing and Management System SPAM user's guide. [Washington, D.C.?]: The Bureau.

Chicago

Occupational Employment Statistics Survey Processing and Management System SPAM User's Guide. [Washington, D.C.?]: The Bureau, 1988.