Cita APA (7th ed.)

Beckman, T. N., & Bartels, R. (1955). Credits and collections in theory and practice (6th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Beckman, Theodore N., i Robert Bartels. Credits and Collections in Theory and Practice. 6th ed. N.Y.: McGraw-Hill, 1955.

Cita MLA (8th ed.)

Beckman, Theodore N., i Robert Bartels. Credits and Collections in Theory and Practice. 6th ed. McGraw-Hill, 1955.