Lehrke, F. B. a. G. The layman printer. Friedrich-ebert.
Chicago Style aipamenaLehrke, Frank Barton and Gunter. The Layman Printer. Friedrich-ebert.
MLA aipamenaLehrke, Frank Barton and Gunter. The Layman Printer. Friedrich-ebert.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.