Tohutoro APA (7th ed.)
Kolkman, P., & Slagter, J. (1976). The Kreekrak Locks on the Scheldt-Rhine connection. Gov.Publ.Off.
Tohutoru Kātū Chicago (17th ed.)
Kolkman, P.A, me J.C Slagter. The Kreekrak Locks on the Scheldt-Rhine Connection. The Hague: Gov.Publ.Off, 1976.
Tohutoro MLA (9th ed.)
Kolkman, P.A, me J.C Slagter. The Kreekrak Locks on the Scheldt-Rhine Connection. Gov.Publ.Off, 1976.
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