APA Citation

Ryden, S., Hultgren, A., & Phragmen, G. (1931). Notes on some archaelogical whistling arrow - heads from Peru. Goteborg: [s.n.].

Chicago Style Citation

Ryden, Stig, A. Hultgren, and G. Phragmen. Notes On Some Archaelogical Whistling Arrow - Heads From Peru. Goteborg: [s.n.], 1931.

MLA Citation

Ryden, Stig, A. Hultgren, and G. Phragmen. Notes On Some Archaelogical Whistling Arrow - Heads From Peru. Goteborg: [s.n.], 1931.

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