APA

Clifford J., Harris G., Ugiansky G. M. & Estados Unidos. National Institute of Standards and Technology^pUS. (1997). Specifications and tolerances for reference standards and field standard weights and measures: 4. Specifications and tolerances for liquefied petroleum gas and anhydrous ammonia liquid volumetric provers. [s.l.]: NIST.

Chicago

Clifford J.F, Harris G.L, Ugiansky G M and Estados Unidos. National Institute of Standards and Technology^pUS. 1997. Specifications and tolerances for reference standards and field standard weights and measures: 4. Specifications and tolerances for liquefied petroleum gas and anhydrous ammonia liquid volumetric provers. [s.l.]: NIST.

Harvard

Clifford J., Harris G., Ugiansky G. M. and Estados Unidos. National Institute of Standards and Technology^pUS. (1997). Specifications and tolerances for reference standards and field standard weights and measures: 4. Specifications and tolerances for liquefied petroleum gas and anhydrous ammonia liquid volumetric provers. [s.l.]: NIST.

MLA

Clifford J.F, Harris G.L, Ugiansky G M and Estados Unidos. National Institute of Standards and Technology^pUS. Specifications and tolerances for reference standards and field standard weights and measures: 4. Specifications and tolerances for liquefied petroleum gas and anhydrous ammonia liquid volumetric provers. [s.l.]: NIST. 1997.