Gaya APA

Rifai, M, A. et al (1990). How to keep your feet & legs healthy for lifetime . New York: New York: Four Walls Eight Windows; 1990.

Gaya MLA

Rifai, Mien, A.. et al. "How to keep your feet & legs healthy for lifetime". New York: New York: Four Walls Eight Windows; 1990, 1990. Text.