Traveling healthy :
a complete guide to medical services in 23 countries /
by Sheilah M. Hillman and Robert S. Hillman.

APA Citation

Hillman, S., Hillman, R. S. (1980). Traveling healthy: a complete guide to medical services in 23 countries. New York: Penguin Books.

MLA Citation

Hillman, Sheilah, and Robert S. Hillman. Traveling Healthy: a Complete Guide to Medical Services In 23 Countries. New York: Penguin Books, 1980.

Warning: These citations may not always be complete (especially for serials).