D.Helsel Jay, & Jensen Cecil H. (2001). Engineering Drawing and Design, Workbook. American: McGraw -Hill.
استشهاد بنمط شيكاغوD.Helsel Jay, و Jensen Cecil H. Engineering Drawing and Design, Workbook. American: McGraw -Hill, 2001.
MLA استشهادD.Helsel Jay, و Jensen Cecil H. Engineering Drawing and Design, Workbook. American: McGraw -Hill, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.