Singapore Polytechnic Building Society. (1973). Quantibuild. Singapore Polytechnic Building Society.
Cita Chicago (17th ed.)Singapore Polytechnic Building Society. Quantibuild. [Singapore: Singapore Polytechnic Building Society, 1973.
Cita MLA (9th ed.)Singapore Polytechnic Building Society. Quantibuild. Singapore Polytechnic Building Society, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.