ISO690 Edition Citation

HELFRITZ, H. 2016. The Yemen: A Secret Journey. London & New York: Routledge.

APA (7th ed.) Citation

Helfritz, H. (2016). The Yemen: A Secret Journey. Routledge.

Chicago Style (17th ed.) Citation

Helfritz, Hans. The Yemen: A Secret Journey. London & New York: Routledge, 2016.

MLA (9th ed.) Citation

Helfritz, Hans. The Yemen: A Secret Journey. Routledge, 2016.

Warning: These citations may not always be 100% accurate.