APA (7th ed.) Citation

Blackburn, J. (1963). A sour apple tree. Penguin ; Secker & Warburg.

Chicago Style (17th ed.) Citation

Blackburn, John. A Sour Apple Tree. Harmondsworth, Middlesex: Penguin ; Secker & Warburg, 1963.

MLA (8th ed.) Citation

Blackburn, John. A Sour Apple Tree. Penguin ; Secker & Warburg, 1963.

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