APA

Helmstetter S., . (1992). You can excel in times of change. New York: Pocket Books.

Chicago

Helmstetter Shad, . 1992. You can excel in times of change. New York: Pocket Books.

Harvard

Helmstetter S., . (1992). You can excel in times of change. New York: Pocket Books.

MLA

Helmstetter Shad, . You can excel in times of change. New York: Pocket Books. 1992.