IPN. (1988). Information Booklet (4th rev. ed.). Kiel : Institute for Science Education at the University of Kiel.
Chicago Style (17th ed.) CitationIPN. Information Booklet. 4th rev. ed. Kiel : Institute for Science Education at the University of Kiel, 1988.
MLA (9th ed.) CitationIPN. Information Booklet. 4th rev. ed. Kiel : Institute for Science Education at the University of Kiel, 1988.
Warning: These citations may not always be 100% accurate.