Software testing methods, levels and types
Manual Testing Help eBook by Software Testing Help
Manual Testing Help eBook by SoftwareTestingHelp.com
Alistair Walker, Alphonse Phillipe, Anne Mette Hass, Jon Hagar, Matthias Daigl, Qin Liu Stuart Reid, Sylvia Veeraraghavan,Tafline Ramos (Murnane),
Software Testing Techniques