Borssum Waalkes, J. v. (1960). Botanical observations on the Krakatau islands in 1951 and 1952 ([Sonderdr.].).
Chicago Style (17th ed.) CitationBorssum Waalkes, Jan van. Botanical Observations on the Krakatau Islands in 1951 and 1952. [Sonderdr.]. 1960.
MLA (9th ed.) CitationBorssum Waalkes, Jan van. Botanical Observations on the Krakatau Islands in 1951 and 1952. [Sonderdr.]. 1960.
Warning: These citations may not always be 100% accurate.