APA (7th ed.) Citation

Mulford, C. E. Hopalong Cassidy's Rustler Round-Up; Or, Bar-20.

Chicago Style (17th ed.) Citation

Mulford, Clarence Edward. Hopalong Cassidy's Rustler Round-Up; Or, Bar-20.

MLA (9th ed.) Citation

Mulford, Clarence Edward. Hopalong Cassidy's Rustler Round-Up; Or, Bar-20.

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