Above and below;
a journey through our national underwater parks,
by Helga Sandburg and George Crile, Jr.

APA Citation

Sandburg, H., Crile, G. (1969). Above and below: a journey through our national underwater parks. [1st ed.] New York: McGraw-Hill.

MLA Citation

Sandburg, Helga, and George Crile. Above And Below: a Journey Through Our National Underwater Parks. [1st ed.] New York: McGraw-Hill, 1969.

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