Cita APA (7a ed.)

WILLBORN WALTER O. (1994). GLOBAL MANAGEMENT OF QUALITY ASSURANCE SYSTEMS. MCGRAW-HILL.

Cita Chicago Style (17a ed.)

WILLBORN WALTER O. GLOBAL MANAGEMENT OF QUALITY ASSURANCE SYSTEMS. NEW YORK: MCGRAW-HILL, 1994.

Cita MLA (9a ed.)

WILLBORN WALTER O. GLOBAL MANAGEMENT OF QUALITY ASSURANCE SYSTEMS. MCGRAW-HILL, 1994.