Cita APA (7a ed.)

ERRIDGE ANDREW. (2001). BEST PRACTICE PROCUREMENT. GOWER.

Cita Chicago Style (17a ed.)

ERRIDGE ANDREW. BEST PRACTICE PROCUREMENT. ENGLAND: GOWER, 2001.

Cita MLA (9a ed.)

ERRIDGE ANDREW. BEST PRACTICE PROCUREMENT. GOWER, 2001.