APA

Belcher L., Forrester R., Octel, Belcher L. & Forrester R. (1973). Some factors affecting exhaust valve seat sinkage in gasoline engines. London: Octel.

Chicago

Belcher L.J, Forrester R.J, Octel, Belcher L.J and Forrester R.J. 1973. Some factors affecting exhaust valve seat sinkage in gasoline engines. London: Octel.

Harvard

Belcher L., Forrester R., Octel, Belcher L. and Forrester R. (1973). Some factors affecting exhaust valve seat sinkage in gasoline engines. London: Octel.

MLA

Belcher L.J, Forrester R.J, Octel, Belcher L.J and Forrester R.J. Some factors affecting exhaust valve seat sinkage in gasoline engines. London: Octel. 1973.