Gaya APA

Grosvenor, D, K. (Sekitar 1960-an–1970). The Wild Ponies of Assateague Island (Cetakan Pertama). Washington, D.C., USA: National Geographic Society.

Gaya MLA

Grosvenor, Donna, K.. "The Wild Ponies of Assateague Island". Cetakan Pertama Washington, D.C., USA: National Geographic Society, Sekitar 1960-an–1970. Text.