Morling, K. (1974). Geometric and engineering drawing (2nd ed.). Butterworth Heinemann.
Cita Chicago (17th ed.)Morling, K. Geometric and Engineering Drawing. 2nd ed. Oxford: Butterworth Heinemann, 1974.
Cita MLA (8th ed.)Morling, K. Geometric and Engineering Drawing. 2nd ed. Butterworth Heinemann, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.