Heißenbüttel, H. (1986). Textbuch. Walter [u.a.].
Chicago Style (17th ed.) CitationHeißenbüttel, Helmut. Textbuch. Olten [u.a.]: Walter [u.a.], 1986.
MLA (9th ed.) CitationHeißenbüttel, Helmut. Textbuch. Walter [u.a.], 1986.
Warning: These citations may not always be 100% accurate.