Lua APA (7ú heag.)

SPENCER RICHARD H. (1983). PLANNING,IMPLEMENTATION & CONTROL IN PRODUCT TEST & ASSURANCE. PRENTICE -HALL INTERNATIONAL, INC.

Lua i Stíl Chicago (17ú heag.)

SPENCER RICHARD H. PLANNING,IMPLEMENTATION & CONTROL IN PRODUCT TEST & ASSURANCE. NEW JERSEY, U.S.A: PRENTICE -HALL INTERNATIONAL, INC, 1983.

Lua MLA (9ú heag.)

SPENCER RICHARD H. PLANNING,IMPLEMENTATION & CONTROL IN PRODUCT TEST & ASSURANCE. PRENTICE -HALL INTERNATIONAL, INC, 1983.

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