Cita APA (7th ed.)

Nowell, D., & Hills, D. (1989). HERTZIAN CONTACT OF GROUND SURFACES.

Cita Chicago (17th ed.)

Nowell, D., i D. Hills. HERTZIAN CONTACT OF GROUND SURFACES. 1989.

Cita MLA (9th ed.)

Nowell, D., i D. Hills. HERTZIAN CONTACT OF GROUND SURFACES. 1989.

Atenció: Aquestes cites poden no estar 100% correctes.