Gaya APA

Obenauf, R, H., Bostwick, R. (2002). Handbook Of Sanple Preparation And Handling . USA: SPEX CertiPrep, Inc.

Gaya MLA

Obenauf, Ralph, H.., Bostwick, Richard. "Handbook Of Sanple Preparation And Handling". USA: SPEX CertiPrep, Inc, 2002. Text.