APA

Bartels A., Riddlestone H. & Riddlestone H. (1965). Intrinsically safe electrical apparatus. Surrey: Electrical Research Association.

Chicago

Bartels A.L, Riddlestone H.G and Riddlestone H.G. 1965. Intrinsically safe electrical apparatus. Surrey: Electrical Research Association.

Harvard

Bartels A., Riddlestone H. and Riddlestone H. (1965). Intrinsically safe electrical apparatus. Surrey: Electrical Research Association.

MLA

Bartels A.L, Riddlestone H.G and Riddlestone H.G. Intrinsically safe electrical apparatus. Surrey: Electrical Research Association. 1965.