APA

Electrical Research Association E., . (1968). The basis of design of intrinsically safe apparatus and circuits. Surrey: Electrical Research Association.

Chicago

Electrical Research Association ERA, . 1968. The basis of design of intrinsically safe apparatus and circuits. Surrey: Electrical Research Association.

Harvard

Electrical Research Association E., . (1968). The basis of design of intrinsically safe apparatus and circuits. Surrey: Electrical Research Association.

MLA

Electrical Research Association ERA, . The basis of design of intrinsically safe apparatus and circuits. Surrey: Electrical Research Association. 1968.