APA (7th ed.) Citation

Higgins Clark, M. (2000). Before I say goodbye. Simon & Schuster UK Ltd.

Chicago Style (17th ed.) Citation

Higgins Clark, Mary. Before I Say Goodbye. Great Britain: Simon & Schuster UK Ltd, 2000.

MLA (8th ed.) Citation

Higgins Clark, Mary. Before I Say Goodbye. Simon & Schuster UK Ltd, 2000.