APA

Felsen H. G., . (1953). Doctor--it tickles!. New York: Prentice-Hall.

Chicago

Felsen Henry Gregor, . 1953. Doctor--it tickles!. New York: Prentice-Hall.

Harvard

Felsen H. G., . (1953). Doctor--it tickles!. New York: Prentice-Hall.

MLA

Felsen Henry Gregor, . Doctor--it tickles!. New York: Prentice-Hall. 1953.