APA

Sweetgall R., Rippe J. M., Katch F. I., Dignam J. & Bush F. (1985). Fitness walking. New York: Perigee Books.

Chicago

Sweetgall Robert, Rippe James M, Katch Frank I, Dignam John‏ and Bush Frederick. 1985. Fitness walking. New York: Perigee Books.

Harvard

Sweetgall R., Rippe J. M., Katch F. I., Dignam J. and Bush F. (1985). Fitness walking. New York: Perigee Books.

MLA

Sweetgall Robert, Rippe James M, Katch Frank I, Dignam John‏ and Bush Frederick. Fitness walking. New York: Perigee Books. 1985.