APA

Gould L. A., Richeson W. E. & Erickson F. L. (1991). Performance evaluation of a camless engine using valve actuators with programmable timing. Warrendale, PA: Society of Automotive Engineers.

Chicago

Gould Larrie A, Richeson William E and Erickson Frederick L. 1991. Performance evaluation of a camless engine using valve actuators with programmable timing. Warrendale, PA: Society of Automotive Engineers.

Harvard

Gould L. A., Richeson W. E. and Erickson F. L. (1991). Performance evaluation of a camless engine using valve actuators with programmable timing. Warrendale, PA: Society of Automotive Engineers.

MLA

Gould Larrie A, Richeson William E and Erickson Frederick L. Performance evaluation of a camless engine using valve actuators with programmable timing. Warrendale, PA: Society of Automotive Engineers. 1991.