APA Style
Galster, H. (1991).
Ph measurement fundamentals, methods, applications, instrumentation .
Weinheim:
VCH Verlagsgesellschaft mbH.
MLA Style
Galster, Helmuth.
"Ph measurement fundamentals, methods, applications, instrumentation".
Weinheim:
VCH Verlagsgesellschaft mbH,
1991.
Buku.