MLA

Ronald W. Armstrong (Ed.); Stephen M. Walley (Ed.); Wayne L. Elban (Ed.). Crystal Indentation Hardness. MDPI - Multidisciplinary Digital Publishing Institute, 2018.

APA

Ronald W. Armstrong (Ed.); Stephen M. Walley (Ed.); Wayne L. Elban (Ed.), R. W. Armstrong (Ed.); Stephen M. Walley (Ed.); Wayne L. Elban (Ed.). (2018). Crystal Indentation Hardness. MDPI - Multidisciplinary Digital Publishing Institute.

Chicago

Ronald W. Armstrong (Ed.); Stephen M. Walley (Ed.); Wayne L. Elban (Ed.) Crystal Indentation Hardness. : MDPI - Multidisciplinary Digital Publishing Institute, 2018.