Παραπομπή σε μορφή APA (7η εκδ.)

Kamas, G., & Lombardi, M. A. (1990). Time and frequency users manual (Rev. 1990.). U.S. Dept. of Commerce, National Institute of Standards and Technology ; For sale by the Supt. of Docs., U.S. G.P.O..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Kamas, George, και Michael A. Lombardi. Time and Frequency Users Manual. Rev. 1990. Gaithersburg, MD : Washington, D.C.: U.S. Dept. of Commerce, National Institute of Standards and Technology ; For sale by the Supt. of Docs., U.S. G.P.O., 1990.

Παραπομπή σε μορφή MLA (8th εκδ.)

Kamas, George, και Michael A. Lombardi. Time and Frequency Users Manual. Rev. 1990. U.S. Dept. of Commerce, National Institute of Standards and Technology ; For sale by the Supt. of Docs., U.S. G.P.O., 1990.