APA-viite (7. p.)
ebrary, Inc, & Becker, L. A. (2011). Helium: Characteristics, compounds, and applications. Nova Science Publishers.
Chicago-viite (17. p.)
ebrary, Inc, ja Lucas A. Becker. Helium: Characteristics, Compounds, and Applications. New York: Nova Science Publishers, 2011.
MLA-viite (9. p.)
ebrary, Inc, ja Lucas A. Becker. Helium: Characteristics, Compounds, and Applications. Nova Science Publishers, 2011.
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