Ric Pimentel; Terry Wall. (2004). Checkpoint Maths Book 1 (Modular Maths for Edexcel). "Trans-Atlantic Publications, Inc.".
Chicago-referens (17:e uppl.)Ric Pimentel; Terry Wall. Checkpoint Maths Book 1 (Modular Maths for Edexcel). "Trans-Atlantic Publications, Inc.", 2004.
MLA-referens (9:e uppl.)Ric Pimentel; Terry Wall. Checkpoint Maths Book 1 (Modular Maths for Edexcel). "Trans-Atlantic Publications, Inc.", 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.