APA Citation

Albrecht, H. P. (1973). World famous horseshoe curve: Altoona Pennsylvania Railroad. Clifton Heights, PA: H.P.A..

Chicago Style Citation

Albrecht, Harry P. World Famous Horseshoe Curve: Altoona Pennsylvania Railroad. Clifton Heights, PA: H.P.A., 1973.

MLA Citation

Albrecht, Harry P. World Famous Horseshoe Curve: Altoona Pennsylvania Railroad. Clifton Heights, PA: H.P.A., 1973.

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