APA-čujuhus (7. p.)

Richards, B. (1959). The heart of a champion. Fleming H. Revell.

Chicago-čujuhus (17. p.)

Richards, Bob. The Heart of a Champion. Westwood: Fleming H. Revell, 1959.

MLA-čujuhus (9. p.)

Richards, Bob. The Heart of a Champion. Fleming H. Revell, 1959.

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