^1990 Children's Writer's and Illustrator's Market Connie Wright Eidenier - 1990 -- Page 184 "Recently recorded songs: "Sandwiches," "Sandwich Polka," "The People on My Street," all written and recorded by Bob King on the Oak Street label (children's music)."
^Canadiana 1990 - Page 194 "Children's songs: Bob King, with instrumental and vocal acc. Words and crédits on folder. Composed and performed by Bob King. Canadian. Contents: Sandwiches (2:33) - The sandwich polka (2:25) - I heard a knock (3:49) .
^Rob Reid - Children's Jukebox: The Select Subject Guide to Children's Musical Recordings 2007 Page 26 " "Sandwiches" (Bob King)
لمعانٍ أخرى، طالع بوب كينغ (توضيح).
كندا 
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