Lua APA (7ú heag.)

Walker, H. F. (2008). The certified quality inspector handbook. ASQ Quality Press.

Lua i Stíl Chicago (17ú heag.)

Walker, H. Fred. The Certified Quality Inspector Handbook. Milwaukee, Wisconsin: ASQ Quality Press, 2008.

Lua MLA (9ú heag.)

Walker, H. Fred. The Certified Quality Inspector Handbook. ASQ Quality Press, 2008.

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