Once in a While (Johnny Mathis album) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Once in a While (Johnny Mathis album)" in English language version.

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allmusic.com

"Once in a While - Johnny Mathis". allmusic.com. All Media Network, LLC. Retrieved March 17, 2014.

archive.org

Whitburn 1986, p. 135. Whitburn, Joel (1986), Joel Whitburn's Pop Memories, 1890-1954, Record Research Inc., ISBN 0898200830

imdb.com

"Pretty Woman (1990) - Soundtracks". imdb.com. Amazon.com. Retrieved March 20, 2014.