Cita APA (7th ed.)
ebrary, Inc, & Helicon (Firm). (2006). The Hutchinson science desk reference. Helicon.
Cita Chicago (17th ed.)
ebrary, Inc, i Helicon (Firm). The Hutchinson Science Desk Reference. Abingdon, Oxon: Helicon, 2006.
Cita MLA (9th ed.)
ebrary, Inc, i Helicon (Firm). The Hutchinson Science Desk Reference. Helicon, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.