Gaya APA

, ., Obert, E, F. (). Internal combustion engines and air polution based on internal combustion ì engines . New: New York: Harper and Row; 1973.

Gaya MLA

, ., Obert, Edward, F.. "Internal combustion engines and air polution based on internal combustion ì engines". New: New York: Harper and Row; 1973, . Text.