APA

Graeff A. D., . (1947). It happened in Pennsylvania. Chicago [u.a.]: Winston.

Chicago

Graeff Arthur D, . 1947. It happened in Pennsylvania. Chicago [u.a.]: Winston.

Harvard

Graeff A. D., . (1947). It happened in Pennsylvania. Chicago [u.a.]: Winston.

MLA

Graeff Arthur D, . It happened in Pennsylvania. Chicago [u.a.]: Winston. 1947.