Hertz, J. (1985). Some early 16th century fortifications in Denmark.
Chicago Style (17th ed.) CitationHertz, Johannes. Some Early 16th Century Fortifications in Denmark. 1985.
MLA (9th ed.) CitationHertz, Johannes. Some Early 16th Century Fortifications in Denmark. 1985.
Warning: These citations may not always be 100% accurate.