Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.