Gaya APA

Hansen, H., Swanson, C, P. (NULL). The world almanac 1964 and book of fact . New: New York: New York World Telegram; 1964.

Gaya MLA

Hansen, Harry., Swanson, Carl, P.. "The world almanac 1964 and book of fact". New: New York: New York World Telegram; 1964, NULL. Text.