APA (7th ed.) Citation

Rand McNally and Company. (1980). Piggyback map of the United States. Piggyback Products.

Chicago Style (17th ed.) Citation

Rand McNally and Company. Piggyback Map of the United States. Los Angeles: Piggyback Products, 1980.

MLA (9th ed.) Citation

Rand McNally and Company. Piggyback Map of the United States. Piggyback Products, 1980.

Warning: These citations may not always be 100% accurate.