APA

Spiegel L., Spicher U., . (1992). Mixture formation and combustion in a spark ignition engine with direct fuel injection. Warrendale, PA: Society of Automotive Engineers.

Chicago

Spiegel L, Spicher U, . 1992. Mixture formation and combustion in a spark ignition engine with direct fuel injection. Warrendale, PA: Society of Automotive Engineers.

Harvard

Spiegel L., Spicher U., . (1992). Mixture formation and combustion in a spark ignition engine with direct fuel injection. Warrendale, PA: Society of Automotive Engineers.

MLA

Spiegel L, Spicher U, . Mixture formation and combustion in a spark ignition engine with direct fuel injection. Warrendale, PA: Society of Automotive Engineers. 1992.