APA

Hersey J., . (1956). A single pebble. New York: Knopf.

Chicago

Hersey John, . 1956. A single pebble. New York: Knopf.

Harvard

Hersey J., . (1956). A single pebble. New York: Knopf.

MLA

Hersey John, . A single pebble. New York: Knopf. 1956.