APA

Swahn S. C., . (1970). The island through the gate. New York: Macmillan.

Chicago

Swahn Sven Christer, . 1970. The island through the gate. New York: Macmillan.

Harvard

Swahn S. C., . (1970). The island through the gate. New York: Macmillan.

MLA

Swahn Sven Christer, . The island through the gate. New York: Macmillan. 1970.