APA Style

Salvador, A. (1994). International Stratigraphic Guide : International Subcommission on Stratigraphic Classification of IUGS International Commission on Stratigraphy (Ed.2). Amerika: The Geological Society.

MLA Style

Salvador, Amos. "International Stratigraphic Guide : International Subcommission on Stratigraphic Classification of IUGS International Commission on Stratigraphy". Ed.2 Amerika: The Geological Society, 1994. Teknik.