APA

Japan, . (1954). Studies on the efficiency of japanese postal workers. Tokio,Japan: s.n.

Chicago

Japan, . 1954. Studies on the efficiency of japanese postal workers. Tokio,Japan: s.n.

Harvard

Japan, . (1954). Studies on the efficiency of japanese postal workers. Tokio,Japan: s.n.

MLA

Japan, . Studies on the efficiency of japanese postal workers. Tokio,Japan: s.n. 1954.