APA aipamena

Lockley, L. C. (1927). Principles of effective letter-writing. McGraw-Hill.

Chicago Style aipamena

Lockley, Lawrence Campbell. Principles of Effective Letter-writing. New York: McGraw-Hill, 1927.

MLA aipamena

Lockley, Lawrence Campbell. Principles of Effective Letter-writing. McGraw-Hill, 1927.