Jefferis Alan, . (2011). Architectural Drafting & Design 6th ed. Australia: Delmar Cengage Learning.
Jefferis Alan, . 2011. Architectural Drafting & Design 6th ed. Australia: Delmar Cengage Learning.
Jefferis Alan, . Architectural Drafting & Design 6th ed. Australia: Delmar Cengage Learning. 2011.