Guillermo Fernández (footballer, born 1993) (English Wikipedia)

Martín, Kiko (17 November 2015). "Guillermo: "Pensar ahora en volver a Bilbao no me ayudaría"" [Guillermo: "Thinking about returning to Bilbao now would not help me"]. Diario AS (in Spanish). Retrieved 31 August 2024.
Hernández, Monserrate (18 August 2016). "Guillermo se siente "preparado" para debutar con el Elche" [Guillermo feels "ready" to make Elche debut]. Diario AS (in Spanish). Retrieved 31 August 2024.
Martín, Kiko (5 June 2018). "¿Qué fue de la plantilla con la que el Lega ascendió a Primera?" [What happened to the squad that promoted to Primera with Lega?]. Diario AS (in Spanish). Retrieved 31 August 2024.

athletic-club.eus

"Guillermo's transfer". Athletic Bilbao. 13 August 2015. Retrieved 13 August 2015.

Monje, Jorge (22 September 2020). "Guillermo Fernández, delantero para el Burgos C.F." [Guillermo Fernández, forward for Burgos C.F.] (in Spanish). Cadena SER. Retrieved 6 September 2023.

"El debut de Guillermo" [Guillermo's debut] (in Spanish). Canal Athletic. 9 November 2013. Retrieved 9 November 2013.

"Guillermo, más gol para el C. D. Numancia" [Guillermo, more goal for C. D. Numancia] (in Spanish). CD Numancia. 27 June 2017. Retrieved 5 July 2017.

Ruiz, Pako (4 November 2022). "Guillermo Fernández: "Te preguntas si podía haber hecho algo más en el Athletic"" [Guillermo Fernández: "You're left wondering if you could have done something more at Athletic"]. Deia (in Spanish). Retrieved 6 September 2023.

Aparicio, Jaume (19 August 2022). "Guillermo Fernández, el '9' elegido para el Nàstic" [Guillermo Fernández, the '9' chosen for Nàstic]. Diari de Tarragona (in Spanish). Retrieved 6 September 2023.

Tranca, Miguel Ángel (5 August 2023). "Guillermo Fernández: "Uno juega donde le quieren"" [Guillermo Fernández: "One plays where they are wanted"]. Diario de León (in Spanish). Retrieved 6 September 2023.

Rhakho, Reyivolü (7 July 2024). "NEUFC sign Spanish forward Fernández Hierro". Eastern Mirror. Retrieved 31 August 2024.

"Subs save the day for Bilbao". ESPN FC. 9 November 2013. Retrieved 18 November 2013.

"Guillermo promoted to the first team as Athletic Club Bilbao hunt goals". Inside Spanish Football. 21 October 2013. Archived from the original on 9 November 2013. Retrieved 9 November 2013.

Martín, Javi (27 August 2012). "Guillermo llama a la puerta del nueve" [Guillermo knocks on nine's door] (in Spanish). La Cantera da Lezama. Retrieved 7 September 2023.

Melero, Delfín (23 February 2014). "Al Betis le salen más pulgas" [More fleas for Betis]. Marca (in Spanish). Retrieved 23 February 2014.
Velasco, Juanma (17 August 2016). "Guillermo Fernández se une al Elche" [Guillermo Fernández joins Elche]. Marca (in Spanish). Retrieved 17 August 2016.
"Guillermo se desvincula del Numancia y ficha por el Racing" [Guillermo cuts ties with Numancia and signs for Racing]. Marca (in Spanish). 31 January 2020. Retrieved 28 February 2020.

"Guillermo promoted to the first team as Athletic Club Bilbao hunt goals". Inside Spanish Football. 21 October 2013. Archived from the original on 9 November 2013. Retrieved 9 November 2013.