Cita APA (7th ed.)

Cowden, D. (1963). Practical Problems in business statistics (2nd.). Prentia hall.

Cita Chicago (17th ed.)

Cowden, Dudley. Practical Problems in Business Statistics. 2nd. Glewood cliffs: Prentia hall, 1963.

Cita MLA (9th ed.)

Cowden, Dudley. Practical Problems in Business Statistics. 2nd. Prentia hall, 1963.