Cita APA (7a ed.)

Houghton, H. W. (1925). Rational arithmetic for commercial students. Gregg Publishing Company.

Cita Chicago Style (17a ed.)

Houghton, H. W. Rational Arithmetic for Commercial Students. London [etc.]: Gregg Publishing Company, 1925.

Cita MLA (9a ed.)

Houghton, H. W. Rational Arithmetic for Commercial Students. Gregg Publishing Company, 1925.