APA (7th ed.) Citation

Ratnayake, P. H. (2018). Easy guide to AutoCAD: : with step by step illustration. [s. n.].

Chicago Style (17th ed.) Citation

Ratnayake, P. H. Easy Guide to AutoCAD: : With Step by Step Illustration. [s. l.]: [s. n.], 2018.

MLA (9th ed.) Citation

Ratnayake, P. H. Easy Guide to AutoCAD: : With Step by Step Illustration. [s. n.], 2018.

Warning: These citations may not always be 100% accurate.