Cita APA (7th ed.)
Stairways Midlands Ltd. MarketLine Company Profile. Marketline.
Cita Chicago (17th ed.)
Stairways Midlands Ltd. MarketLine Company Profile. Marketline.
Cita MLA (9th ed.)
Stairways Midlands Ltd. MarketLine Company Profile. Marketline.
Atenció: Aquestes cites poden no estar 100% correctes.