APA (7th ed.) Citation

Ketchum, W. C. (1985). Forties and fifties collectables for fun and profit. HP Books.

Chicago Style (17th ed.) Citation

Ketchum, William C. Forties and Fifties Collectables for Fun and Profit. Tuscon: HP Books, 1985.

MLA (9th ed.) Citation

Ketchum, William C. Forties and Fifties Collectables for Fun and Profit. HP Books, 1985.

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