Hartmann, E. (1998). The functions of sleep. University Microfilms International.
Chicago Style (17th ed.) CitationHartmann, Ernest. The Functions of Sleep. Ann Arbor: University Microfilms International, 1998.
MLA (9th ed.) CitationHartmann, Ernest. The Functions of Sleep. University Microfilms International, 1998.
Warning: These citations may not always be 100% accurate.