APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

ERRIDGE ANDREW. BEST PRACTICE PROCUREMENT. GOWER, 2001.