APA

gregory b. . a., . (1982). an introuduction to electrical instremention. london: elbs.

Chicago

gregory b a, . 1982. an introuduction to electrical instremention. london: elbs.

Harvard

gregory b. . a., . (1982). an introuduction to electrical instremention. london: elbs.

MLA

gregory b a, . an introuduction to electrical instremention. london: elbs. 1982.