James Robert Parish The Great Cop Pictures Metuchen, N.J., & London, 1990 |
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Frank N. Magill (ed.) Magill's Cinema Annual 1982, A Survey of 1981 Films Englewood Cliffs, New Jersey, 1982 pp. 259-262 |
Larry Langman & David Ebner Encyclopedia of American Spy Films New York & London, 1990 |