Cita APA (7th ed.)
Hans-Dieter Barke, G. H. Essentials of Chemical Education. Springer.
Cita Chicago (17th ed.)
Hans-Dieter Barke, Günther Harsch. Essentials of Chemical Education. Berlín, Alemania: Springer.
Cita MLA (9th ed.)
Hans-Dieter Barke, Günther Harsch. Essentials of Chemical Education. Springer.
Atenció: Aquestes cites poden no estar 100% correctes.