Citazione APA

Illick, J. S., & Aughanbaugh, J. E. (1930). Pitch pine in Pennsylvania. Dept. of Forests and Waters.

Stile di citazione Chicago

Illick, Joseph S., e John E. Aughanbaugh. Pitch Pine in Pennsylvania. Harrisburg, Pa.: Dept. of Forests and Waters, 1930.

Citazione MLA

Illick, Joseph S., e John E. Aughanbaugh. Pitch Pine in Pennsylvania. Dept. of Forests and Waters, 1930.