Big top boss : : John Ringling North and the circus.

MLA

Hammarstrom, David Lewis. Big Top Boss : John Ringling North and the Circus. Urbana Chicago: University of Illinois Press, 1992.

APA

Hammarstrom, D. Lewis. (1992). Big top boss : John Ringling North and the circus. Urbana Chicago: University of Illinois Press.

Chicago

Hammarstrom, David Lewis Big Top Boss: John Ringling North and the Circus. Urbana Chicago: University of Illinois Press, 1992.