Dyfyniad APA

Schuller ,Robert H. (1988). Tough Times Never Last But Tough People Do. Orient Paperbacks.

Dyfyniad Arddull Chicago

Schuller ,Robert H. Tough Times Never Last But Tough People Do. Delhi: Orient Paperbacks, 1988.

Dyfyniad MLA

Schuller ,Robert H. Tough Times Never Last But Tough People Do. Orient Paperbacks, 1988.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.