APA

Polska Norma. PN-71. S-04052, . (1971). Measurement of motorvehicle noise. Limits of sound level (På polska). Warszawa: Polska Norma. PN-71. S-04052.

Chicago

Polska Norma. PN-71. S-04052, . 1971. Measurement of motorvehicle noise. Limits of sound level (På polska). Warszawa: Polska Norma. PN-71. S-04052.

Harvard

Polska Norma. PN-71. S-04052, . (1971). Measurement of motorvehicle noise. Limits of sound level (På polska). Warszawa: Polska Norma. PN-71. S-04052.

MLA

Polska Norma. PN-71. S-04052, . Measurement of motorvehicle noise. Limits of sound level (På polska). Warszawa: Polska Norma. PN-71. S-04052. 1971.