APA (7th ed.) Citation

Watson, H. D. (1948). Botanical notes on trees of the British forests. Oliver and Boyd.

Chicago Style (17th ed.) Citation

Watson, Harry D. Botanical Notes on Trees of the British Forests. Edinburgh: Oliver and Boyd, 1948.

MLA (9th ed.) Citation

Watson, Harry D. Botanical Notes on Trees of the British Forests. Oliver and Boyd, 1948.