Cita APA (7a ed.)

Armstrong, R. W., Elban, W. L., & Walley, S. M. (2018). Crystal Indentation Hardness. MDPI - Multidisciplinary Digital Publishing Institute.

Cita Chicago Style (17a ed.)

Armstrong, Ronald W., Wayne L. Elban, y Stephen M. Walley. Crystal Indentation Hardness. Basel: MDPI - Multidisciplinary Digital Publishing Institute, 2018.

Cita MLA (9a ed.)

Armstrong, Ronald W., et al. Crystal Indentation Hardness. MDPI - Multidisciplinary Digital Publishing Institute, 2018.