Lang, S. (1968). A First Course in Calculus. Reading, Massachusetts: Addison-Wesley Pub. Co..
Dyfyniad Arddull ChicagoLang, Serge. A First Course in Calculus. Reading, Massachusetts: Addison-Wesley Pub. Co., 1968.
Dyfyniad MLALang, Serge. A First Course in Calculus. Reading, Massachusetts: Addison-Wesley Pub. Co., 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.