Robert H. Schuller (1993). “Robert H Schuller: The Inspirational Writings : Tough Times Never Last, But Tough People Do/Tough Minded Faith for Tender Hearted People”, Bbs Publishing Corporation
Leo Tolstoy (2016). “ANNA KARENINA – Two Unabridged Translations in One Premium Edition (World Classics Series): The Greatest Romantic Tragedy of All Times from the Renowned Author of War and Peace & The Death of Ivan Ilyich (Including Biographies of the Author)”, p.1150, e-artnow
Robert H. Schuller (1993). “Robert H Schuller: The Inspirational Writings : Tough Times Never Last, But Tough People Do/Tough Minded Faith for Tender Hearted People”, Bbs Publishing Corporation
Robert H. Schuller (1993). “Robert H Schuller: The Inspirational Writings : Tough Times Never Last, But Tough People Do/Tough Minded Faith for Tender Hearted People”, Bbs Publishing Corporation