Gaya APA

Britannica, C. (1973). Walnut to Zurich volume 19 (Ed. 3 Tahun 1973). London: Hazell Watson & Viney Limited.

Gaya MLA

Britannica, Children's. "Walnut to Zurich volume 19". Ed. 3 Tahun 1973 London: Hazell Watson & Viney Limited, 1973. Text.