Gaya APA
Dominic, J, F., Schöpfel, J. (2010).
Grey Literature in Library and Information Studies .
Berlin:
De Gruyter Saur.
Gaya MLA
Dominic, J., Farace,., Schöpfel, Joachim.
"Grey Literature in Library and Information Studies".
Berlin:
De Gruyter Saur,
2010.
E-book.