APA (7th ed.) Citation

201990 Howe, J. M., & Engel, B. (1991). Heart to heart '91 [disket].

Chicago Style (17th ed.) Citation

201990 Howe, Jean M., and Bernard Engel. Heart to Heart '91 [disket]. 1991.

MLA (9th ed.) Citation

201990 Howe, Jean M., and Bernard Engel. Heart to Heart '91 [disket]. 1991.

Warning: These citations may not always be 100% accurate.