Gaya APA

WELCH, S. (1979). SARGENT WELCH Scientific Laboratory Instruments : Apparatus - Furniture - Chemicals - SUpplies (Catalog 128) (Ed 1). : SARGENT WELCH.

Gaya MLA

WELCH, SARGENT. "SARGENT WELCH Scientific Laboratory Instruments : Apparatus - Furniture - Chemicals - SUpplies (Catalog 128)". Ed 1 : SARGENT WELCH, 1979. Text.